Control surveys

(a) Horizontal Control Survey A Horizontal Control Survey is a type of survey which establishes points on a horizontal coordinate system, such as latitude and longitude, state, municipal, or arbitrary coordinates. The horizontal control net shall comply with one of the Classes of Horizontal Accuracy defined in Section 20-300b-11 of these regulations. (b) Vertical Control Survey A Vertical Control Survey is a type of survey which establishes bench marks in relation to an appropriate vertical datum. Vertical measurements shall comply with one of the Classes of Vertical Accuracy defined in Section 20-300b-11 of these regulations.